Torque transmitting and cushioning means



Feb. 20, 1951 K s. l.. MEslRow l 2,542,154

TORQUE TRANSMITTING AND CUSHIONING MEANS www@ w IN V EN TOR.

Patented Feb. 20, 1951 UNITED STATES TENT DF'FICE TORQUE .'IRANSMITTING yAND CUSHIONING MEANS .Sheldon L. Mes'irow, Chicago, Ill., assigner ltoLee .Producta Ehio., Chicago, lill., a corporation of AApplication December 3, 1948., Serial No. 63'35'0 :2 Claims. 1

This invention relates to 'torque transmitting and cushioning means, and `more particularly 'to -a device intended to be driven from "any suitable source of 'power to impart to van associated implement a rotatable a-nd `yielfda-ble operation.

Primarily, the device is 'intended to be used as a coupling and mounting for asanding or polishing disc or wheel, in the operation Yof which it is desirable that the `disc or wheel change inclinations during the working of the disc to `avoid the formation Vof scoring .grooves or Vconcentric scratches and packing of the disc or lwheel surface Ywith abraded material.

One of the .objects of my invention is the provision of a device adapted -to -be driven byran-electric motor and .to carry a sanding fdisc or fthe like, said device being resilientfan'd permitting theldisc to yield at inclinations within the limits of the device during its operation.

Another object of my inventio-n is the provision of a mounting of the character set forth which absorbs all vibration and shock incident to the operation of the disc or wheel, thereby minimizing fatigue to the operator and increasing the service life of the wheel or disc.

A further object of my invention is the provision of a resilient mounting and coupling for abrasive or polishing discs or the like which permits more rapid operation of said disc and improved control by the operator thereof.

A still further object of my invention is the provision of a resilient mounting for sanding discs or Wheels which absorbs all shock and Vibration incident to the operation of the discs or Wheels thereby preventing the transmission of such shock or vibration to the driving motor and minimizing Wear on the bearings and rotating parts thereof.

A still further object of my invention is the provision of a mounting for a sanding disc which permits rapid mounting and dismounting of the sanding disc Without the use of accessory tools.

Other and further objects of my invention not at this time particularly enumerated will be made. more apparent as the description proceeds, especially when considered in connection with the accompanying drawings wherein:

Figure 1 is a side elevational View of one embodiment of my invention and illustrating the application thereof.

Figure 2 is an enlarged longitudinal sectional view of the device shown in Figure 1.

Figure 3 is a similar View of another embodiment.

Figure 4 is a cross sectional View taken on line 4-4 of Figure 3.

Figure 5 is a side 'elevational view 4on a reduced scale v'illustrating an application of the embodinient 'shown in Figures 3 and 4.

vReferring more specifically to Figures =3 :and 4 ofthe drawings, the numeral ID designates generally amounting in accordance with my invention, the said mounting .comprising a body II of resilient material, such las soft rubber. The body 'I'I is .made of .desire-d thickness and, as seen clearly 'in `1figure '2, includes an axially 4 disposed interna'lly threaded metal element 1'2 provided at one end with an annular flange or shoulder I3 having a series of cir-.cularly arranged perforations -I 4,. .Another element I6 .similarly includes 4an internally threaded body lportion provided with an annular ange IL'I also having .circularly .arranged perforations I 8.

The elements I2 and I6 are arranged incoaxial alinement with the flanges I3 and II in spaced relation so as to provide for freedom of movement between the elements. The elements I2 and I6 are molded into the body II with the material thereof surrounding the body portions and flanges of the elements and bonded thereto. Increased effective bonding is afforded by the perforations I4 and I8 which, in the molding operation, become filled with the body material II. Thus, in addition to the increased bonding surfaces provided by the flanges I3 and I1, the rubber portions disposed in the perforations I4 and I8 provide for greater torque value and will still yield readily to misalinement of the elements I2 and I6.

As illustrated in Figure 5 the mounting I0 is adapted to be secured on the end of a driving shaft I9 of a portable electric motor or on the spindle of a flexible shaft, with the element I2 in threaded engagement with the shaft. A sanding disc or wheel '20 is intended to be placed against a backing member 2l which lies against the face of the body II and to be secured thereto by a flanged threaded bushing 25, the latter being threaded into the element I6.

It will of course be understood that the direction of rotation of the disc in relation to the threads of the bushing 25 is such that there is a tendency during the operation of the disc to make the dise more secure on the mounting. In order to dismount the disc it is merely required to grasp the peripheral edge of the disc and turn the same in a direction to unscreW the bushing. I have found that there is suliicient friction between the flange of the bushing 25 and the face of the disc and that sucient leverage is available so that an operator may effect a ready dis- 3 mounting of the disc without the use of any accessory tools.

Figure 3 illustrates another form of mounting l5 in which the element I 6'is replaced by an element 23 having a threaded projection 24 adapted to receive preferably a cupped grinding wheel 22 provided with an imbedded bushing. In other respects the structure of the element 23 is similar to that of element l2. Similarly, as in the case of the disc mounting l0, the wheel 22 may be disanounted by grasping the edge thereof and turning the same in a direction to unscrew the Wheel from the projection 24.

It Will be understood that elements such as I2 may have means other than threads for coupling the mounting to a motor shaft.

From the foregoing detailed description it will be apparent that in normal operation the plane of rotation of the disc 20 or Wheel 22 Will be at right angle to the axis of the driving shaft I9 but, as the operator places pressure on the Work surface or where variations on the work surface are encountered, the disc 20 or wheel 22 will v adjust itself angularly relative to the axis of the driving shaft. The parts will be restored to their normal relationship when permitted.

In using some types of abrasive discs or wheels there is a tendency on the part of the disc or wheel to score the Work surface. This tendency is counteracted by the resiliency of the body portion l l which permits a gyratory action of the disc 20 or whee1'22 due to yielding compression and expansion of the body Il.

While my invention has been described as a mounting for a sanding or polishing disc, it will be apparent that my invention finds application as a coupling for connecting together two rotary elements between which driving torque is to be transmitted.

I claim:

1. In a device of the character described, a body of resilient shape-retaining material having substantially flat faces at opposed sides thereof, longitudinally spaced internally threaded sleeve like elements in said body, said elements being in axial alignment and each having an end ush with one of said faces, and a circular flange on the other end of each of said elements, said anges having a plurality of holes therein.

2. In a device of the character described, a body of resilient shape-retaining material having substantially flat faces at opposed sides thereof, longitudinally spaced internally threaded sleevelike elements in said body, said elements being in axial alignment and each having an end flush with one of said faces, the material of said resilient body extending a short distance into and being bonded to the threaded surface of each of said elements, and a circular flange on the other end of each of said elements, said flanges having a plurality of holes therein.

SHELDON L. MESIROW.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 2,270,309 Kehle Jan. 20, 1942 2,271,568 Olson Feb. 3, 1942 2,295,282 Mall Sept. 8, 1942 2,297,619 Haberstump Sept. 29, 1942 

